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Ambrosia confertiflora A.P. de Candolle. Field Ragweed. Phen: Aug-Oct. Hab: Disturbed areas. Dist: Sw. KS, s. CO, s. UT, c. CA, south to s. TX, w. TX, NM, AZ, and widespread in Mexico. Reported for TN (Strother (2006dd).

Origin/Endemic status: Native

Synonymy: = FNA21, K3, K4, Mex, NcTx, Ok, Tx; = Ambrosia confertifolia – GrPl, orthographic error

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Heliophily ?: 9

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